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id="doc-content" class="doc-page-holder"><div class="doc-page"><h1>Delay <span class="page-badge">组件</span></h1><div class="doclet" id="Delay"><span class="markdown"><p>一个在给定时间之后触发函数的组件。</p>
<p>这个使用 Crafty 内部时钟同步，一般优先采用<code>setTimeout</code>。</p>
</span></div><div><h4>方法</h4><ul class="page-toc"><li><a href="#-cancelDelay">.cancelDelay()</a></li><li><a href="#-delay">.delay()</a></li><li><a href="#-pauseDelays">.pauseDelays()</a></li><li><a href="#-resumeDelays">.resumeDelays()</a></li></ul><div class="doclet" id="-cancelDelay"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">.cancelDelay()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-noun">this.cancelDelay</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Function </span><span class="sig-noun">callback</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> callback </dt><dd><span class="markdown"><p>调用 .delay 时绑定的函数</p>
</span></dd></dl></div><span class="markdown"><p>cancelDelay 方法将会取消之前的delay设定。</p>
</span><div class="example"><h4>例子</h4><span class="markdown"><pre><code class="hljs "><span class="hljs-keyword">var</span> doSomething = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>)</span>{
  Crafty.log(<span class="hljs-string">"doing something"</span>);
};

<span class="hljs-comment">// execute doSomething each 100 miliseconds indefinetely</span>
<span class="hljs-keyword">var</span> ent = Crafty.e(<span class="hljs-string">"Delay"</span>).delay(doSomething, <span class="hljs-number">100</span>, <span class="hljs-number">-1</span>);

<span class="hljs-comment">// and some time later, cancel further execution of doSomething</span>
ent.cancelDelay(doSomething);</code></pre></span></div></div><div class="doclet" id="-delay"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">.delay()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-noun">this.delay</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Function </span><span class="sig-noun">callback</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">delay</span></span><span class="sig-seperator">[,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">repeat</span></span><span class="sig-seperator">[,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Function </span><span class="sig-noun">callbackOff</span></span><span class="sig-seperator">]])</span></code><dl class="parameter"><dt> callback </dt><dd><span class="markdown"><p>将在给定的毫秒后执行函数，如果函数是通过引用传递的，后边还可以取消。</p>
</span></dd></dl><dl class="parameter"><dt> delay </dt><dd><span class="markdown"><p>毫秒数</p>
</span></dd></dl><dl class="parameter"><dt> repeat </dt><dd><span class="markdown"><p>(可选) 执行函数的次数。如果值为零，函数执行一次；如果值为n&gt;0,执行n+1次；如果值为 -1，执行无限次。默认执行一次。</p>
</span></dd></dl><dl class="parameter"><dt> callbackOff </dt><dd><span class="markdown"><p>(可选) 函数将在执行完成后触发。(所有次数都执行完成)。如果执行次数为 -1, callbackOff 永远不会被触发。</p>
</span></dd></dl></div><span class="markdown"><p>delay 方法将在指定的毫秒数后执行一个方法。</p>
<p>它不是 <code>setTimeout</code> 的包装。</p>
<p>如果 Crafty 暂停了, 计时也会暂停；当 Crafty 继续时，计时也继续。</p>
<p>如果实体被销毁，计时也会被销毁，而且不会产生任何效果。</p>
</span><div class="example"><h4>例子</h4><span class="markdown"><p>delay 实例</p>
<pre><code class="hljs ">Crafty.log(<span class="hljs-string">"start"</span>);
Crafty.e(<span class="hljs-string">"Delay"</span>).delay(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
  Crafty.log(<span class="hljs-string">"100ms later"</span>);
}, <span class="hljs-number">100</span>, <span class="hljs-number">0</span>);</code></pre><p>所有执行次数完成后触发毁掉函数</p>
<pre><code class="hljs ">Crafty.log(<span class="hljs-string">"start"</span>);
Crafty.e(<span class="hljs-string">"Delay"</span>).delay(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
  Crafty.log(<span class="hljs-string">"100ms later"</span>);
}, <span class="hljs-number">100</span>, <span class="hljs-number">3</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
  Crafty.log(<span class="hljs-string">"delay finished"</span>);
});</code></pre></span></div></div><div class="doclet" id="-pauseDelays"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">.pauseDelays()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-noun">this.pauseDelays</span></span><span class="sig-seperator">()</span></code></div><span class="markdown"><p>pauseDelays 方法将会停止计时，直到实体被唤醒。</p>
</span><div class="example"><h4>例子</h4><span class="markdown"><pre><code class="hljs "><span class="hljs-keyword">var</span> doSomething = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>)</span>{
  Crafty.log(<span class="hljs-string">"doing something"</span>);
};

<span class="hljs-comment">// execute doSomething each 100 miliseconds indefinetely</span>
<span class="hljs-keyword">var</span> ent = Crafty.e(<span class="hljs-string">"Delay"</span>).delay(doSomething, <span class="hljs-number">100</span>, <span class="hljs-number">-1</span>);

<span class="hljs-comment">// and some time later, the gameplay is paused</span>
ent.pauseDelays();</code></pre></span></div></div><div class="doclet" id="-resumeDelays"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">.resumeDelays()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-noun">this.resumeDelays</span></span><span class="sig-seperator">()</span></code></div><span class="markdown"><p>resumeDelays 将会唤醒之前被暂停的实体。</p>
</span><div class="example"><h4>例子</h4><span class="markdown"><pre><code class="hljs "><span class="hljs-keyword">var</span> doSomething = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>)</span>{
  Crafty.log(<span class="hljs-string">"doing something"</span>);
};

<span class="hljs-comment">// execute doSomething each 100 miliseconds indefinetely</span>
<span class="hljs-keyword">var</span> ent = Crafty.e(<span class="hljs-string">"Delay"</span>).delay(doSomething, <span class="hljs-number">100</span>, <span class="hljs-number">-1</span>);

<span class="hljs-comment">// and some time later, the gameplay is paused (or only</span>
<span class="hljs-comment">// a part of it is frozen)</span>
ent.pauseDelays();

<span class="hljs-comment">// the player resumes gameplay</span>
ent.resumeDelays();</code></pre></span></div></div></div></div></div></div>
			
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